中文摘要：

在实验室模拟了某钢厂罩式退火工艺,利用金相显微镜、洛氏硬度计、XRD衍射仪和透射电镜研究了稀土低碳钢冷轧板第二相粒子的析出行为对组织织构演变的影响。退火后成品板为饼形晶粒,退火过程中{001}〈110〉织构逐渐减弱,{111}织构逐渐增强且在成品板中保留一定量的{112}〈110〉织构。退火过程中有Fe3C析出且对组织织构演变影响较小,稀土元素在650℃时依附于Fe3C上析出,起到了稀土元素的微合金化作用,Al N在600℃以上析出,促使再结晶晶粒定向长大对饼形晶粒的形成有重要的作用,热力学及动力学计算表明退火过程中Mn S没有析出,其对组织织构演变影响极小。

英文摘要：

Effect of secondary phase precipitation on evolution of microstructure of cold rolled low - carbon steel sheets containing rare earth in annealing was studied with optical microscope, Rockwell hardness tester, XRD and TEM. The elongated grains were formed after annealing. {001} 〈 110 〉 taxture was weaken,but {111} texture was enhanced, and a certain a- mount of {112} 〈 110 〉 texture retained, precipitaed Fe3C has less effect on microstructure and texture evolution, and rare earth elements precipitated depending on Fe3C at 650℃. AIN precipitated above 600℃. MnS did not precipitate during annea- ling which was studied by thermodynamics kinetics calculation and had little influence on microctructure and texture evolution.